Related Clues:

• Desert dearth
• Addition to a concentrate
• Tend the plants, in a way
• Tend to the garden
• Fragile layer
• Hydrophobe's worry
• Pure air
• An element, to the ancients
• Oxygen form
• No-cal drink
• Protective layer
• Desert rarity
• Word after 17, 38, 59-Across, 11, 34-Down
• Adam's ale
• Earth's ___ layer